Added simple nl (number lines) utility

bobbi/Makefile

@@ -1,8 +0,0 @@
-all: sortdir
-
-sortdir: sortdir.c
-	occ -w -o sortdir sortdir.c
-
-install: sortdir
-	cp sortdir /usr/local/bin
-

bobbi/Makefile#000000

@@ -0,0 +1,11 @@
+all: nl sortdir
+
+nl: nl.c
+	occ -w -o nl nl.c
+
+sortdir: sortdir.c
+	occ -w -o sortdir sortdir.c
+
+install: sortdir nl
+	cp nl sortdir /usr/local/bin
+

bobbi/nl.c#b00008

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void usage(void) {
+	fputs("usage: nl [filename]\n", stderr);
+}
+
+int main(int argc, char *argv[]) {
+	if (argc > 2) {
+		usage();
+		exit(2);
+	}
+	FILE *in;
+	if (argc == 2) {
+		in = fopen(argv[1], "r");
+		if (!in) {
+			fprintf(stderr, "nl: cannot open '%s'\n", argv[1]);
+			exit(1);
+		}
+	}
+	else
+		in = stdin;
+
+	int line = 1;
+	int flag = 0;
+	printf("%5d  ", line++);
+	while (!feof(in)) {
+		unsigned char c = fgetc(in);
+		if (c == '\n' || c == '\r')
+			flag = 1;
+		else if (c != 0xff) {
+			if (flag)
+				printf("\n%5d  ", line++);
+			flag = 0;
+			putchar(c);
+		}
+	}
+	putchar('\n');
+}
+